what can I do??
You didn't think to tell us when you bought it?? What counts is how long you have had it, not just that it went wrong a month ago.
It sounds as though you must have received it well over 30 days ago. If so, there is nothing you can do through eBay, and PayPal only covers faults that are presnt on delivery.
Any responsibility will now rest with the seller. If they're a UK business seller, you should in theory have the same statutory consumer rights as if you bought it from a shop.
In practice, having consumer rights means very little unless you can enforce them. This can be difficult or impossible, as many sellers on eBay don't want to know about problems. Even manufacturers' warranties are liable to be invalid for items bought here.
If necessary, you can consult trading standards or citizens advice. Or, if it's worthwhile, consider using the small claims court or the Courts and Tribunals internet based money claim service, see: https://www.moneyclaim.gov.uk/web/mcol/welcome.
It the seller is a private seller, or abroad, there's nothing you can do.
Good luck, but buying from unknown sellers on eBay isn't like the shops.
